[Bug 429036] Re: core i7 i5 (Lynnfield) turbo boost not working

[Michael Bommarito]

The bug is patched in 10.04 but not Karmic/Jaunty, so you'll need to make
the jump or compile a new kernel yourself if you want to stay on
Karmic/Jaunty.

You should get full speeds (less virt overhead) on the Windows 7 host, as
Win7 will have already set the machine in a state allows TB.

Thanks,
-Michael J. Bommarito II
University of Michigan
http://www-personal.umich.edu/~mjbommar/


On Wed, Mar 10, 2010 at 10:52, Teox <mfacc1980 at yahoo.it> wrote:

> I have a notebook with i7-720qm and I use Ubuntu 9.04 (which is still
> supported and updated): is this bug patched also there? Kernel version
> is 2.6.28 line.
>
> But if I use a bugged linux kernel version in VirtualBox as a guest
> machine with hardware virtualization (using VT-x, nested paging or EPT,
> VPIDs or Virtual Processor Identifiers) in a Windows 7 host, is this bug
> still valid? Or everything is managed by Windows 7 host?
>
> Thanks!
>
> --
> core i7 i5 (Lynnfield) turbo boost not working
> https://bugs.launchpad.net/bugs/429036
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in The Linux Kernel: Fix Released
> Status in “linux” package in Ubuntu: Confirmed
>
> Bug description:
> According to
> http://www.phoronix.com/scan.php?page=article&item=intel_p55&num=4,
> Intel core i7 and i5 (Lynnfield) processors do not work well with ubuntu
> (both Ubuntu 9.04 and Ubuntu 9.10 Alpha 5).
> In detail, turbo boost does not work and occasionally creates performance
> problems.
>
> To unsubscribe from this bug, go to:
> https://bugs.launchpad.net/linux/+bug/429036/+subscribe
>

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core i7 i5 (Lynnfield) turbo boost not working
https://bugs.launchpad.net/bugs/429036
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